Kepler-9c

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Kepler-9c is one of the first seven extrasolar planets, exoplanets, discovered by NASA's Kepler Mission, and one of at least two planets orbiting the star Kepler-9. Kepler-9c and Kepler-9b were the first exoplanets confirmed to be transiting their star.

Excerpt from the Wikipedia article “Kepler-9c”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Aldaron, a.k.a. Aldaron, CC BY-SA 3.0, via Wikimedia Commons.